<PackageReference Include="System.Security.Permissions" Version="11.0.0-rc.1.26425.128" />

System.Security.Policy.PolicyStatement

public PolicyStatementAttribute Attributes { get; set; }

public string AttributeString { get; }

public PermissionSet PermissionSet { get; set; }

public void FromXml(SecurityElement et)

public void FromXml(SecurityElement et, PolicyLevel level)